Uploaded April 2025 | Updated September 2026, 2 weeks ago
Clem attempts to create an audio transmission system using two old microphones, exploring the process of converting audio into a digital signal via pulse-width modulation (PWM). He encounters difficulties in getting the analog system to function properly, detailing the use of low-pass filters, amplifiers, and comparator circuits to modulate audio onto a carrier frequency. Clem shares his understanding of the theory behind the project but admits that the system doesn't quite work as planned.
He asks viewers for feedback on whether to continue with the analog approach or shift to a digital solution, with all related schematics and files available for download on the element14 Community: bit.ly/4iuFYsE
#analogaudio #diyelectronics #PulseWidthModulation #electronicsproject
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Engage with the element14 presents team on the element14 Community - suggest builds, find project files and behind the scenes video: bit.ly/3tmdewv
Visit the element14 Community for more great activities and free hardware:
Tech spotlights: bit.ly/3qPrDhM
RoadTest and Reviews: bit.ly/3pV5Bux
Project14: bit.ly/31wbnJY
Clem attempts to create an audio transmission system using two old microphones, exploring the process of converting audio into a digital signal via pulse-width modulation (PWM). He encounters difficulties in getting the analog system to function properly, detailing the use of low-pass filters, amplifiers, and comparator circuits to modulate audio onto a carrier frequency. Clem shares his understanding of the theory behind the project but admits that the system doesn't quite work as planned.
He asks viewers for feedback on whether to continue with the analog approach or shift to a digital solution, with all related schematics and files available for download on the element14 Community: bit.ly/4iuFYsE
#analogaudio #diyelectronics #PulseWidthModulation #electronicsproject
===========================================================
Engage with the element14 presents team on the element14 Community - suggest builds, find project files and behind the scenes video: bit.ly/3tmdewv
Visit the element14 Community for more great activities and free hardware:
Tech spotlights: bit.ly/3qPrDhM
RoadTest and Reviews: bit.ly/3pV5Bux
Project14: bit.ly/31wbnJY

![Building a Wi-Fi Controlled Cookie Jar Using an ESP32 and Strava Data
Milos rebuilds his old Smart Cookie Jar project using modern parts, a compact 3D-printed locking mechanism, and an ESP32 connected to Strava. The jar stays locked until you complete your chosen running distance, turning your workout into a reward you actually have to earn. In the video he walks through the updated mechanism, the ESP32/Strava integration, and a real test run to prove it works—all while keeping the jar looking like an ordinary container of treats! https://bit.ly/4oRCJyx
#ESP32 #StravaAPI #3dprinting
[02:03]-The Plan
[03:46]-Locking Mechanism
[06:03]-Software
[09:48]-Assembly
[11:37]-The Dem-Ho-Ho-Ho
Check out the element14 Community Holiday competition here: https://bit.ly/48Htxbz
Engage with the element14 presents team on the element14 Community - suggest builds, find project files and behind the scenes video: https://bit.ly/3tmdewv
Visit the element14 Community for more great activities and free hardware:
Tech spotlights: https://bit.ly/3qPrDhM
RoadTest and Reviews: https://bit.ly/3pV5Bux
Project14: https://bit.ly/31wbnJY Building a Wi-Fi Controlled Cookie Jar Using an ESP32 and Strava Data](https://i.ytimg.com/vi/jsQTD_6HNTA/mqdefault.jpg)


![Upgrading My Electronics Workbench: Tools I Actually Use Every Day
In this episode, Clem walks through his new electronics workbench and explains why he chose each part of the setup, from the adjustable desk and fume extraction to power supplies, soldering, rework, and test equipment. We sent Multicomp Pro tools, selected by Clem for his upgrade. He shares what worked, what didn’t, and how real-world use shaped his decisions, with plenty of practical detail for makers and engineers planning their own bench upgrade: https://bit.ly/49L0u5Z
Disclosure: These Tools were provided by Multicomp Pro, a brand owned by Newark and Farnell (The team and company behind element14 Presents) all the of kit were selected by Clem and sent to him from our own warehouse. We have chosen to tick the Sponsored Content / Paid content flag for transparency.
#ElectronicsWorkbench #electronicslab #makertools
[01:22]-New Tools
[02:35]-Power Supply
[04:01]-De-soldering iron
[06:26]-A Load of hot air
[11:16]-Multimeter [
13:59]-Waveform Generator
[15:42]-Handheld
[18:12]-Oscilloscopes
[20:13]-Wrap Up
Engage with the element14 presents team on the element14 Community - suggest builds, find project files and behind the scenes video: https://bit.ly/3tmdewv
Visit the element14 Community for more great activities and free hardware:
Tech spotlights: https://bit.ly/3qPrDhM
RoadTest and Reviews: https://bit.ly/3pV5Bux
Project14: https://bit.ly/31wbnJY Upgrading My Electronics Workbench: Tools I Actually Use Every Day](https://i.ytimg.com/vi/kvbtw0qgq0c/mqdefault.jpg)




![ESP32 Halloween Project: The Painting That Talks Back!
Mark builds a motion-activated “haunted painting” using an ESP32, a MAX98357 I²S audio board, and a PIR motion sensor to make a framed photo whisper or talk when someone walks by. The project is simple to wire, fits neatly inside a photo frame, and can be customized for Halloween, cosplay, or even pranks. Mark walks through the full build—from cutting the frame and soldering components to programming the ESP32 in Arduino—so you can easily recreate it. Perfect for anyone wanting to mix art, electronics, and a bit of Halloween mischief: https://bit.ly/46S7hL4
[01:59]-The Schematics
[02:48]-The Layout
[09:42]-Soldering
[14:41]-PIR Sensor
[15:54]-Programming
[20:05]-ThE DeMo
#ESP32 #HalloweenProject #DIYElectronics
Be sure to check out and get involved with our Halloween Hackathon! Create, Scare, Win! https://bit.ly/46X4JLO
Engage with the element14 presents team on the element14 Community - suggest builds, find project files and behind the scenes video: https://bit.ly/3tmdewv
Visit the element14 Community for more great activities and free hardware:
Tech spotlights: https://bit.ly/3qPrDhM
RoadTest and Reviews: https://bit.ly/3pV5Bux
Project14: https://bit.ly/31wbnJY ESP32 Halloween Project: The Painting That Talks Back!](https://i.ytimg.com/vi/lThNzvftBzE/mqdefault.jpg)
![Creating an ESD or Lightning Detector
Clem builds a custom ESD detector to identify electrostatic discharge events that can interfere with electronic circuits and cause unexpected glitches. Based on a proven design by Charles Wenzel, the detector outputs a logic-safe pulse that can trigger test equipment like oscilloscopes, helping correlate ESD with system faults. The video covers circuit design, case integration using EMI-shielded enclosures, and real-world testing scenarios. Download the design files and see how you can build your own low-cost debugging tool! https://bit.ly/43JS1hP
#ElectronicsDebugging #ESDProtection #DIYTestEquipment
[01:53] The Problem
[03:09] The Case
[04:08] The Circuit
[13:37] Populating the PCB
[15:39] Assembly
[16:52] Demo
[21:03] Final Round Up
Engage with the element14 presents team on the element14 Community - suggest builds, find project files and behind the scenes video: https://bit.ly/3tmdewv
Visit the element14 Community for more great activities and free hardware:
Tech spotlights whitepapers: https://bit.ly/3qPrDhM
RoadTest and Reviews: https://bit.ly/3pV5Bux
Project14 Competitions: https://bit.ly/31wbnJY Creating an ESD or Lightning Detector](https://i.ytimg.com/vi/lWy5UBRMFgI/mqdefault.jpg)